PLATE XVI. 



Figs. 1-3. — Streptocaulus pulcherrimus. 

 Fia;. 1.— Natural size. 



Fig. 2. — Portion of hydrocladium, magnified ; lateral view. 

 Fig. 3. — Same ; front view. 



Figs. 4, 5. — Cladocarpus fovmoms. 



Fig. 4. — Natural size. 



Fig. 5. — Portion of stem carrying a hydrocladium with phylactocarp and gonangia ; 

 magnified. 



